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| author | Joseph Myers <joseph@codesourcery.com> | 2017-06-19 12:00:13 +0000 |
|---|---|---|
| committer | Joseph Myers <joseph@codesourcery.com> | 2017-06-19 12:00:13 +0000 |
| commit | 21f8859dd08fd231198eda4095061837d527b926 (patch) | |
| tree | 665630983166c66aee1242bad7c96d1b361110a3 /signal | |
| parent | a66bc30d6b19ca6c9c77c0d3750acb18c691705f (diff) | |
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Fix signal stack namespace (bug 21584).
In POSIX.1:2008, various signal stack symbols - sigaltstack, SS_*,
SIGSTKSZ, MINSIGSTKSZ - are all XSI-shaded. glibc wrongly makes them
visible for non-XSI POSIX. This patch fixes the conditionals, leaving
the symbols available for __USE_MISC as it seems likely some of them
are widely used and should be visible by default. (Note that stack_t
is *not* XSI-shaded and so the conditionals on that are correctly
unchanged.)
Tested for x86_64.
[BZ #21584]
* signal/signal.h: Make includes of <bits/sigstack.h> and
<bits/ss_flags.h> conditional on [__USE_XOPEN_EXTENDED ||
__USE_MISC].
(sigaltstack): Make declaration conditional on
[__USE_XOPEN_EXTENDED || __USE_MISC].
Diffstat (limited to 'signal')
| -rw-r--r-- | signal/signal.h | 10 |
1 files changed, 6 insertions, 4 deletions
diff --git a/signal/signal.h b/signal/signal.h index 23cd8efb14..8dfe849890 100644 --- a/signal/signal.h +++ b/signal/signal.h @@ -301,20 +301,22 @@ extern int sigreturn (struct sigcontext *__scp) __THROW; calls be restarted after signal SIG. */ extern int siginterrupt (int __sig, int __interrupt) __THROW; -# include <bits/sigstack.h> # include <bits/types/stack_t.h> -# include <bits/ss_flags.h> # if defined __USE_XOPEN || defined __USE_XOPEN2K8 /* This will define `ucontext_t' and `mcontext_t'. */ # include <sys/ucontext.h> # endif +#endif /* Use POSIX.1-2008 or X/Open Unix. */ + +#if defined __USE_XOPEN_EXTENDED || defined __USE_MISC +# include <bits/sigstack.h> +# include <bits/ss_flags.h> /* Alternate signal handler stack interface. This interface should always be preferred over `sigstack'. */ extern int sigaltstack (const stack_t *__restrict __ss, stack_t *__restrict __oss) __THROW; - -#endif /* Use POSIX.1-2008 or X/Open Unix. */ +#endif /* __USE_XOPEN_EXTENDED || __USE_MISC */ #if ((defined __USE_XOPEN_EXTENDED && !defined __USE_XOPEN2K8) \ || defined __USE_MISC) |